Use a nationwide directory like MyMedicareBroker.com to search for a Medicare...

https://www.pure-bookmark.win/choosing-a-medicare-broker-starts-with-checking-credentials-use

Use a nationwide directory like MyMedicareBroker.com to search for a Medicare broker by state or county. Verify the broker’s NPN, then ask whether they can help with Medicare Supplement, Medicare Advantage, and Part D plans. Availability varies.